diff --git a/build/package.json b/build/package.json
index e655065889e..4ac479620c2 100644
--- a/build/package.json
+++ b/build/package.json
@@ -61,7 +61,7 @@
     "plist": "^3.0.1",
     "source-map": "0.6.1",
     "tmp": "^0.2.1",
-    "typescript": "^4.5.0-dev.20210817",
+    "typescript": "^4.5.0-dev.20210826",
     "vsce": "1.48.0",
     "vscode-universal-bundler": "^0.0.2"
   },
diff --git a/build/yarn.lock b/build/yarn.lock
index e0d34a5e444..35c74d5b85d 100644
--- a/build/yarn.lock
+++ b/build/yarn.lock
@@ -2348,10 +2348,10 @@ typed-rest-client@^0.9.0:
     tunnel "0.0.4"
     underscore "1.8.3"
 
-typescript@^4.5.0-dev.20210817:
-  version "4.5.0-dev.20210817"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.0-dev.20210817.tgz#6b0d0ce68c2381cc85fd0d609817cb3576eb9480"
-  integrity sha512-G427tdOZrQKSEUcLF+dq57gK7D6CzxhbZggpEwqZP1HDuBhIk2bu+br9QvR5uoubR2P6lHhWhUZaCDmkIpnnDQ==
+typescript@^4.5.0-dev.20210826:
+  version "4.5.0-dev.20210826"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.0-dev.20210826.tgz#c00fa7b8980c21f648e475ec340f721908e7bec9"
+  integrity sha512-ZFkM93Srjzl0dDBIBsYpQmxZ8884iw8oXAh68ifWN9l0JFk5bGeocJhlId26STGfaF49Ry8Ld8V5msBjo/5/9A==
 
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.5"
diff --git a/package.json b/package.json
index cbc75144c52..41060dd0715 100644
--- a/package.json
+++ b/package.json
@@ -198,7 +198,7 @@
     "style-loader": "^1.0.0",
     "ts-loader": "^9.2.3",
     "tsec": "0.1.4",
-    "typescript": "^4.5.0-dev.20210817",
+    "typescript": "^4.5.0-dev.20210826",
     "typescript-formatter": "7.1.0",
     "underscore": "^1.12.1",
     "util": "^0.12.4",
diff --git a/yarn.lock b/yarn.lock
index 84e9e4be87b..f4adb4347b5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10236,10 +10236,10 @@ typescript@^2.6.2:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.2.tgz#3c5b6fd7f6de0914269027f03c0946758f7673a4"
   integrity sha1-PFtv1/beCRQmkCfwPAlGdY92c6Q=
 
-typescript@^4.5.0-dev.20210817:
-  version "4.5.0-dev.20210817"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.0-dev.20210817.tgz#6b0d0ce68c2381cc85fd0d609817cb3576eb9480"
-  integrity sha512-G427tdOZrQKSEUcLF+dq57gK7D6CzxhbZggpEwqZP1HDuBhIk2bu+br9QvR5uoubR2P6lHhWhUZaCDmkIpnnDQ==
+typescript@^4.5.0-dev.20210826:
+  version "4.5.0-dev.20210826"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.0-dev.20210826.tgz#c00fa7b8980c21f648e475ec340f721908e7bec9"
+  integrity sha512-ZFkM93Srjzl0dDBIBsYpQmxZ8884iw8oXAh68ifWN9l0JFk5bGeocJhlId26STGfaF49Ry8Ld8V5msBjo/5/9A==
 
 typical@^4.0.0:
   version "4.0.0"